Several years ago I called Mr. Rogers Windows to quote new windows for the house we were in at the time. Mr. Rogers used Anderson Woodwright replacement windows exclusively. They quoted something like $20k to do my windows. I couldn't swing it. I called an Anderson window dealer here in Charlotte and, using Mr. Rogers' quote, got a materials quote from the dealer for what just the windows would cost. The price for materials was $7,500 or so. That sounded a whole lot better! I visited the showroom and had the salesman and one of their installers step me through the process of replacing the windows myself. Turns out it was cake! I was amazed at how easy Anderson made the replacement windows to install. Pry the old window out and leave the frame and sash in place. Four screws per window is all that holds them in. Each window comes with backer rod insulation to stuff in the cracks. The outer trim just snaps on and looks perfect. I did the whole house myself over a couple of weekends (+-16 windows). My house was a ranch and all the windows were accessible from ground level or from a small step ladder. I loved those Anderson windows. I wish I had them at the house we are in now.